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Benefits of the Grey Pneumatic "High Torque" Drive:Transfers the pressure from the thinnest part of the socket wall toward the thicker section, resulting in increased strength.Allows up to 20% more torque to be applied than on standard hex impact sockets.The shift in pressure allows less socket wall thickness, increasing access to tight areas.Sockets grip the fastener across a broader contact area, reducing the chance of rounding off fasteners.